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44 results on '"Kulić Filip"'

1. Fuzzy logic applications in inland waterway transportation

Author

Bugarski Vladimir, Kulić Filip, Kanović Željko, and Bačkalić Todor

Subjects
traffic control, inland waterway, fuzzy expert system, Agriculture
Abstract

New applications of a fuzzy expert system (FES) for direct control of traffic lights in the areas of locks and one-way sections on inland waterways are presented. FES implements the knowledge of experts in the field of water transport on a controller. FES-SL (application in ship locks) was created for a single-chamber two-way ship lock. The system decides when the lock process will be performed depending on the current requests and queues. FES-1WS (application in one-way sections) was created for a canal network with sections where one-way vessel traffic is allowed due to the width limitation. The system is applicable for different traffic densities (from 10 to 90 vessels per day) and different lengths of one-way sections (from 2km to 24km).

Published
2020
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2. Developing of web-based knowledge platform for agricultural production in a controlled environment

Author

Kulić Filip, Bugarski Vladimir, Todorović Vladimir, and Kamenko Ilija

Subjects
internet, web-portal, knowledge platform, greenhouses, Agriculture
Abstract

This paper describes developing a web-based knowledge platform, which would become a 'meeting place' on the Internet for all interested market participants (stakeholders) in business with agricultural production in a controlled environment - greenhouses. The developed platform will allow better visibility of the agricultural products and their positioning in the market, better advertising of the products and increase the possibility of creating products according to market demands. Proposed approach will concentrate the knowledge and information so that every single participant in the market will get timely and appropriate responses to his questions and issues. That way of solving the problems will significantly shorten the time of searching for an answer and avoid 'wandering' that unnecessarily consume all the resources (time, money, energy).

Published
2017
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3. Web based application for optimal greenhouse production system selection

Author

Kamenko Ilija, Dimitrijević Aleksandra, Kulić Filip, and Nikolić Perica

Subjects
web, database, application, greenhouse, plant production, Agriculture
Abstract

In this paper is shown a description of the application based on the latest web technologies for optimal greenhouse production system selection. Web application is based on pre-formed expert model implemented in the web application with parameters stored in a database for easy maintenance. Using latest web technologies is achieved massive scale and availability of such expert knowledge to anyone with the Internet access and with standard web browser. The application in a very intuitive way to an agricultural producer, based on his initial idea and implemented expert model, guides throughout the process of selecting the optimal greenhouse production system and system parameters.

Published
2016

4. Computer aided design with Eplan electric P8 educational

Author

Matić Dragan, Lukač Duško, Bugarski Vladimir, Kulić Filip, and Nikolić Perica

Subjects
project, schematic, eplan, Agriculture
Abstract

This paper presents design of electrical schematics and technical drawings by Eplan Electric P8 Educational. It is contemporary software tool for computer added design (CAD) of control cabinets. Technical documentation is divided into schematics and reports. Schematics are based on the graphical symbols and reports are given in tabular or graphical form. Graphical symbols are presented with standardized symbols or device macros. Reports can be generated automatically based on schematic. Numerous types of reports are supported cable and terminal strip overview, cable and terminal diagram, PLC overview and diagram. Major national and international standards are supported. For efficient and quality schematic design users are advised to get proper training through Eplan Certified Student (ECS) or Eplan Certified Technician (ECT) programs.

Published
2016

5. Trends in modern SCADA systems

Author

Bugarski Vladimir, Nikolić Perica, Kulić Filip, Matić Dragan, and Kamenko Ilija

Subjects
scada, control, data acquisition, modern trends, Agriculture
Abstract

Modern production processes request modern solutions in the field of control and supervision. As present SCADA (Supervisory Control And Data Acquisition) systems are based on computer and communication technologies, they are also high influenced with them. Today's trend in modern SCADA system is a usage of tools and techniques from computer technologies and communication. It provides the possibility to design a SCADA system efficiently with easy access to process data, for instance with using web protocol and cloud computing. Second major advantage of using computer technologies is integration of modern databases in SCADA system. This trend push SCADA systems from local applications to distributed systems based on modern internet protocols and make collected information more accessible to users.

Published
2015

6. Overview of the possibilities of using different communication channels for data acquisition purposes

Author

Nikolić Perica, Bugarski Vladimir, Matić Dragan, Kamenko Ilija, and Kulić Filip

Subjects
communication, data, acquisition, trends, Agriculture
Abstract

Modern production processes necessitate modern means of communication. Different applications feature different data volumes and bandwidths. It is at times required to transfer just a couple of alphanumerical characters, whereas other occasions demand a live streaming of high-definition audio and video data. This paper presents an overview of communication possibilities and proposes appropriate application tools. Modern communication technologies have different tools for achieving these goals. Mobile communication and the widespread Internet access provide the necessary tools, while constant changes in the filed open new possibilities. It is essential to comprehend the possibilities of different means of communication in order to determine their proper utilization for different purposes.

Published
2016

7. Detection of the broken bar fault: A case study for a 3.2 MW induction motor

Author

Matić Dragan, Kanović Željko, Bugarski Vladimir, Kulić Filip, Reljić Dejan, Oros Đura, and Vasić Veran

Subjects
broken bar, induction motor, fourier transform, hilbert transform, wavelet transform, Agriculture
Abstract

This paper covers a case study for broken bar detection for 3.2 MW motor in a thermal power plant application. One phase current acquisition is considered. Feature extraction is based on transient and steady state analysis. Fourier, Hilbert and Wavelet transforms are used. Working conditions implicate low shaft load setting. It is shown that reliable broken bar detection is possible when contemporary digital signal processing techniques are used.

Published
2013

8. Expert system for induction motor fault detection

Author

Kulić Filip, Kanović Željko, Petković Milena, and Matić Dragan

Subjects
induction machine, fault detection, expert system, Agriculture
Abstract

The paper describes the development and implementation of an expert system for fault detection of induction motors. Early detection of induction motors failures may prevent the occurrence of malfunction and ensure timely replacement and servicing. In order to make timely and accurate fault detection an expert system is designed and developed. The expert system is a software system aimed at 'simulating' human-expert knowledge and assistance in making decisions in a particular area. This paper presents a conceptually new type of expert system based on the artificial neural networks. Inputs into the expert system are the results of the algorithms to detect faults based on different physical quantities (current and vibration). The expert system performs analysis of input data and, based on them, it finally defines the type of fault or faults in the case of multiple failures.

Published
2010

9. Modern SCADA systems in production of soy flour and grits and textured soy proteins

Author

Bugarski Vladimir, Nikolić Perica, and Kulić Filip

Subjects
scada, plc, flour, grits, tsp, Agriculture
Abstract

This paper describes the SCADA (Supervisory Control And Data Acquisition) software in the plant for production of soy flour and grits and textured soy proteins (TSP), which relies on PLC (Programmable Logic Controller). Six touch panels in the field are networked with two PC's in control room and together make a system that on one side communicates with the PLC and on the other side allows operators access to all parts of the plant. The additional features of software are: the alertness to the possible excesses of the system via alarm messages, the graphical representation of tags in form of a tables or trends, archiving information in a database, creating reports, etc... The software is designed with the suggestions of operators who have extensive experience in the management of these plants. The software was tested and put into operation in the factory 'Soyaprotein' in Becej, Serbia.

Published
2010

10. Modern supervisory control system in a pneumatic transport system: Practical realization

Author

Nikolić Perica, Bugarski Vladimir, Matić Dragan, and Kulić Filip

Subjects
transport, pneumatic, programmable logic control, scada, supervision, practical implementation, Agriculture
Abstract

Modern supervisory control systems cover a large number of different solutions for different production processes. A pneumatic transport process of powdered and granular materials served as an example in this paper. The supervisory control system performs a task of controlling and supervising transport paths. The paper presents a possible solution for a supervisory control system and its practical realization. The task of this SCADA (Supervisory Control and Data Acquisition) system is to meet all functional requirements and to offer a user-friendly everyday production system. The practical implementation of SCADA system is based on the underlying programmable logic controller. The solution presented in the paper can be used in similar transport systems in production plants.

Published
2014

11. Web interface of expert system for improving the soil quality

Author

Kamenko Ilija, Nikolić Perica, Matić Dragan, and Kulić Filip

Subjects
web technology, interface, soil quality, agricultural producer, expert system, Agriculture
Abstract

This paper presents the implementation of access to the expert system for improving soil quality using the latest web technologies. By logging to the system via the given web address using a standard web browser and a valid internet connection allows the keeping of records of soil sampling for each parcel separately and obtaining an advisory opinion. The agricultural producer for each parcel should perform sampling and from the nearest laboratory obtain the results of chemical analysis of soil samples and using the same web interface to enter data obtained. Based on this data at any time via the web interface agricultural producer can make a query for each parcel and immediately get calculation of the required amount of active mineral substances for the desired crop. In addition to the total required amount of active substances also is provided a plan of dosing through fertilization and feeding.

Published
2012

12. The practical example of connecting the plant processing industry into a single supervisory and control system

Author

Nikolić Perica, Bugarski Vladimir, Kulić Filip, and Oros Đura

Subjects
communication, process industry, connecting, supervision and control, Agriculture
Abstract

This paper describes the connecting of different plants within the processing industry using modern technologies. The basic idea is to show the ability of linking different manufacturer's equipment into a single supervisory system. The contemporary manufacturing requires modern solutions in the field of supervision and management so as to increase the efficiency and reduce the production costs of the final product. The connectivity solution shown in this paper is in line with modern trends and demands of the real production process. The described system was practically implemented in the plant using the internationally standardized communication media and protocols. The practical implementation provided users with a better insight into the production process by providing a number of possibilities for data collecting and analysis.

Published
2010

13. Survey of the methods for online broken bar induction motor fault detection

Author

Matić Dragan, Kulić Filip, and Bugarski Vladimir

Subjects
induction motor, broken rotor bar fault, radial basis artificial function neural network, current spectrum, Agriculture
Abstract

The paper deals with the survey of some know online methods for broken rotor bar (BB) detection within induction motors and provides an overview of the method for fault detection via the radial basis function (RBF) artificial neural network (ANN). The condition monitoring of electric machinery can significantly reduce the cost of maintenance and the risk of unexpected failures by allowing the early detection of potentially catastrophic faults. The rotor faults account for 10% of overall induction motor faults. As classification features, the characteristic sidebands values extracted from line current spectrum are taken. Based on the chosen features, it is possible to classify induction motors in one of the two following groups: correct or BB fault in online working mode. If broken bar occurs, the proposed models give the estimation of the number of broken rotor bars. A motor must be connected to the mains for the direct online start at nominal load; there is no possibility for a multi-fault detection mode.

Published
2010

15. A novel fuzzy logic scheme for PID controller auto-tuning

Author

Kamenko, Ilija, Čongradac, Velimir, Kulić, Filip, Kamenko, Ilija, Čongradac, Velimir, and Kulić, Filip

Abstract

This paper presents a novel method for PID (proportional–integral–derivative) controller auto-tuning based on expert knowledge incorporated into a fuzzy logic inference system. The proposed scheme iteratively tries to improve the performance of the closed-loop system. As performance measures, the proposed scheme uses the characteristics of the step response (rise time, overshoot, and settling time). PID parameters in the first iteration can be calculated based on the basic open-loop step response experiment or it is possible to use current parameters. In each successive iteration, step response characteristics are measured and the relative changes expressed in the percentage of value in the first iteration are calculated and converted into linguistic values. The fuzzy expert system computes fuzzy values that are used after defuzzification as multiplying factors for current PID parameters. To achieve a balance between the aggressive and robust closed-loop response, as well as between the slower and the faster one, the fuzzy expert system works in three operating modes: the one for speeding up the system, the one for reducing the overshoot, and the one for a balanced reduction of rise time and overshoot. The performance and robustness are verified by computer simulation using an extensive range of different processes.

Published
2022

17. Савремене методе пројектовања конвенционалних индустријских регулатора под ограничењима на робусност

Author

Rapaić, Milan, Šekara, Tomislav, Jeličić, Zoran, Kulić, Filip, Kapetina, Mirna, Mikulović, Jovan, Bošković, Marko, Rapaić, Milan, Šekara, Tomislav, Jeličić, Zoran, Kulić, Filip, Kapetina, Mirna, Mikulović, Jovan, and Bošković, Marko

Abstract

Предмет истраживања је развој нових метода пројектовања конвенционалних управљачких структура пропорционално-интегрално- диференцијалног типа, са и без редно везаног стабилишућег компензатора. Предложене методе пројектовања су примјенљиве на широкoj класи индустријских процеса: стабилних, интегралних, нестабилних, процеса са временским кашњењем, затим процеса са неминималном фазом, процеса са дистрибуираним параметрима. Посебно су развијене аналитичке формуле подешавања параметара PID/PIDC регулатора за секундарну регулацију фреквенције и снаге размјене у оквиру конвенционалних електроенергетских система., Predmet istraživanja je razvoj novih metoda projektovanja konvencionalnih upravljačkih struktura proporcionalno-integralno- diferencijalnog tipa, sa i bez redno vezanog stabilišućeg kompenzatora. Predložene metode projektovanja su primjenljive na širokoj klasi industrijskih procesa: stabilnih, integralnih, nestabilnih, procesa sa vremenskim kašnjenjem, zatim procesa sa neminimalnom fazom, procesa sa distribuiranim parametrima. Posebno su razvijene analitičke formule podešavanja parametara PID/PIDC regulatora za sekundarnu regulaciju frekvencije i snage razmjene u okviru konvencionalnih elektroenergetskih sistema., The subject of the research is the development of new methods for designing conventional control structures of the proportional-integral-differential type, with and without a series-connected stabilizing compensator. The proposed design methods are applicable to a wide class of industrial processes: stable, integral, unstable, time-delayed processes, processes with non-minimum phase, processes with distributed parameters. Analytical formulas for adjusting the parameters of PID / PIDC controllers for secondary regulation of frequency and power interchange within conventional power systems have been specially developed.

Published
2021

18. Classificaton of the objects detected in front of the vehicle using front view camera

Author

Kulić, Filip and Grbić, Ratko

Subjects
TEHNIČKE ZNANOSTI. Računarstvo. Umjetna inteligencija, classification, neural network, konvolucija, neuronska mreža, deep learning, convolution, duboko učenje, ADAS, klasifikacija, TECHNICAL SCIENCES. Computing. Artificial Intelligence
Abstract

U današnje doba pokušava se postići što veća autonomija vozila, a za to su zaduženi napredni sustavi za pomaganje vozaču (ADAS, engl. Advanced driver-assistance systems). Krajnji cilj razvoja jednog takvog sustava jest omogućiti potpunu autonomiju vozila. Kako bi jedan takav sustav mogao donositi odluke, treba raspolagati informacijama koje pružaju uvid u okolinu vozila, tj. objekte koji okružuju automobil. Prilikom normalne vožnje (unaprijed), sustavu je najbitnije raspolagati informacijama o objektima koji se nalaze ispred vozila. Ovaj rad se bavi klasifikacijom objekata detektiranih s prednje strane vozila gdje ulaz u algoritam klasifikacije predstavljaju slike objekata. Diplomski rad opisuje klasifikaciju objekata koristeći duboke konvolucijske mreže te je kao dio rada opisan postupak izrade jedne takve mreže, od prikupljanja slika koje predstavljaju podatke pa do samog učenja mreže. Također, opisani su i pojedini slojevi od kojih se takva duboka neuronska mreža sastoji. U radu je izvršena evaluacija izrađenih mreža i razmatrani su problemi koji se mogu stvoriti kod krive klasifikacije i zašto do njih dolazi. Nowadays, we are trying to achieve as much vehicle autonomy as possible by developing Advanced driver-assistance systems (ADAS). The ultimate goal of developing such a system is allowing complete autonomy of the vehicle. In order for such a system to make decisions, it should have information that provides insight into the environment of the vehicle, i.e. the objects surrounding the car. During forward driving, it is most important for the system to have information about the objects in front of the vehicle. This paper describes the classification method of using deep convolutional neural networks of the objects detected in the front of the vehicle. The input into the classification algorithm is represented by the image of the object. This paper describes the process of making such a network, from collecting and grouping the images that represent the data up to the learning of the network itself. This paper also describes individual layers which comprise such a deep neural network. In this paper, an evaluation of created networks has been carried out and the paper also discusses why and what problems could occur when using such a method for classification.

Published
2018

21. Website and ordering service for beauty salon

Author

Kulić, Filip and Lukić, Ivica

Subjects
web page, web aplikacija, Angular, web stranica, TECHNICAL SCIENCES. Computing. Program Engineering, responzivan dizajn, web application, responsive design, TEHNIČKE ZNANOSTI. Računarstvo. Programsko inženjerstvo, Bootstrap
Abstract

U ovom završnom radu cilj je bio izrada funkcionirajuće web stranice koja se prilagođava zaslonu te web aplikacije koja olakšava rezervaciju termina za neku uslugu. Pri odabiru tehnologije za izradu responzivne web stranice, uz HTML, CSS i JavaScript koji čine osnovu izrade web stranica, bilo je ključno odabrati framework koji ima ugrađen sustav mreže (engl. grid system) te koji ima dobru dokumentaciju. Odabran je Bootstrap koji ima daleko najveću podršku te najviše dokumentacije kao najpopularniji projekt na GitHubu. Uz pomoć bootstrap, ne izostavljajući HTML, CSS, i JavaScript, izrađena je funkcionalna web stranica koja se prilagođava zaslonu. Odabiru tehnologije za izradu web aplikacije pao je na Angular, najpopularniji JavaScript framework. Uz pomoć Angulara izrađena je aplikacija koja omogućuje odabir usluge ovisno o izabranoj kategoriji te odabir dva termina. The main task of this Bachelor thesis was developing a functional web site which adapts its structure depending on the size of the screen and to develop a web application which allows the user to arrange an appointment for a service. When choosing the technology for development of a responsive web site, not counting HTML, CSS or JavaScript, it was crucial to choose a framework which had grid system embedded into it and also a framework which had lots of documentation, hence Bootstrap was chosen. Bootstrap was a logical choice since it’s the most popular project on GitHub. A functional page was created using Bootstrap and also elementary technologies of front-end; HTML, CSS and JavaScript. Choosing a technology for web application hasn’t been that hard since Angular is the most popular JavaScript framework. So, the web application was made using Angular, which allows the user to arrange two appointments and a service according to the category.

Published
2016

22. EFFECTS OF INTRODUCING THE IMPROVED ENERGY MANAGEMENT SYSTEM IN THE URGENT CARE CENTER OF THE CLINICAL CENTER OF VOJVODINA.

Author

OROS, Djura V., ČONGRADAC, Velimir D., VASIĆ, Veran V., and KULIĆ, Filip J.

Subjects
SUPERVISORY control systems, OUTPATIENT medical care, ENERGY consumption, ELECTRIC power, HEAT, ENERGY consumption of buildings
Abstract

The Urgent Care Center of the Clinical Center of Vojvodina in city of Novi Sad, Republic od Serbia, as a specific medical facility with very demanding conditions of work and functioning, has an extensive and constant energy demands. The building is new, set into operation in 2010. The state-of-the-art concept and the equipment installed create conditions for using advanced solutions in the framework of supervisory and control systems, increasing energy efficiency and reducing operating costs in the Urgent Center. The aim of this paper is the assessment of additional possibilities for increasing energy efficiency in the building using a number of control techniques available today. According to a source of energy, the most utilized is the electric power, which is consumed for air conditioning, compressed air, and lighting. Thermal energy is used for space heating in winter and the preparation of hot water. The first step in increasing energy efficiency was the continuous monitoring and recording of consumption. The next step was the analysis of the energy consumption and the discovery of critical areas of consumption. The final step was related to the plans and algorithms for the energy reduction. To this goal, the energy consumption in the period March 2014-February 2016 was measured and recorded. According to that measuring and data analysis, an expert system based on the methods of computational intelligence that combines all the developed actions and algorithms for increasing energy efficiency in one unit was implemented. [ABSTRACT FROM AUTHOR]

Published
2019
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23. Adaptivna estimacija parametara sistema opisanih iracionalnim funkcijama prenosa

Author

Rapaić, Milan, Kovačević, Branko, Jeličić, Zoran, Kulić, Filip, Šekara, Tomislav, Kapetina, Mirna, Rapaić, Milan, Kovačević, Branko, Jeličić, Zoran, Kulić, Filip, Šekara, Tomislav, and Kapetina, Mirna

Abstract

Predmet istraživanja je identifikaciji i adaptivna estimacija parametara široke klase linearnih sistema. Predloženi algoritmi za adaptivnu estimaciju parametara su primenjivi na sisteme koji se opisuju funkcijama prenosa proizvoljnog oblika, što uključuje sisteme sa kašnjenjem, distribuiranim parametrima, frakcione sisteme i druge sisteme opisane iracionalnim funkcijama prenosa. Na posletku, dat je algoritam za identifikaciju CNG sistema koji se ne izvršava u realnom vremenu i pretpostavlja da struktura modela nije poznata unapred., The subject of this research is the system identification and adaptive parameter estimation in wide class of linear processes. Proposed approaches for adaptive parameter estimation can be applied to systems described by transfer functions of arbitrary form, including systems with delay, distributed-paratemeter systems, fractional order systems, and other system described by irrational transfer functions. In the final part, an offline algorithm for identification of CNG system which does not assume any a priori known model structure is proposed.

Published
2017

24. Web based application for visualization of geospatial data in agriculture

Author

Kamenko, Ilija, Jakovljević, Boris, Kulić, Filip, Nikolić, Perica, and Bugarski, Vladimir

Subjects
geographic map, soil quality, web, visualization, database
Abstract

In this paper is shown a description of the application based on the latest web technologies for visualization of geospatial data in agriculture. Developed application in a very intuitive way and in a manner tailored to the end user provides the ability to view parcels data and soil quality historical data. The web application relies on a database with already an enviable number of parcels data and soil quality historical data. By using new web technologies during developing application enables displaying the soil quality data visually positioned on the georeferenced geographic map of a wider area where the sample was taken. Moving around on the map instead of scrolling through the table with a vast number of rows enables to the user a comfortable work and data analysis that is raised to a higher level.

Published
2015

25. Web based application for optimal greenhouse production system selection

Author

Kamenko, Ilija, Kamenko, Ilija, Dimitrijević, Aleksandra, Kulić, Filip, Nikolić, Perica, Kamenko, Ilija, Kamenko, Ilija, Dimitrijević, Aleksandra, Kulić, Filip, and Nikolić, Perica

Abstract

In this paper is shown a description of the application based on the latest web technologies for optimal greenhouse production system selection. Web application is based on pre-formed expert model implemented in the web application with parameters stored in a database for easy maintenance. Using latest web technologies is achieved massive scale and availability of such expert knowledge to anyone with the Internet access and with standard web browser. The application in a very intuitive way to an agricultural producer, based on his initial idea and implemented expert model, guides throughout the process of selecting the optimal greenhouse production system and system parameters., U ovom radu je dat opis aplikacije bazirane na najsavremenijim veb tehnologijama za izbor optimalnog sistema biljne proizvodnje u kontrolisanim uslovima. Veb aplikacija se oslanja na prethodno formiran ekspertski model izbora tehnološko- tehničkog sistema gajenja u kontrolisanim uslovima. Model je implementiran u okviru veb aplikacije dok su parametri modela smešteni u bazi podataka radi lakšeg održavanja. Razvijena veb aplikacija je bazirana na najnovijim veb i internet tehnologijama koje omogućavaju masovnost i dostupnost takvog ekspertskog znanja do svakog ko ima pristup internetu i standardní veb pregledač. Aplikacija na veoma intuitivan način krajnjeg poljoprivrednog proizvođača, na osnovu njegovih početnih ideja, vodi kroz postupak izbora optimalnog sistema. Sam postupak je organizovan u koracima radi lakše interakcije sa korisnikom. Na osnovu željene biljne kulture i raspoložive površine, oslanjajući se na ekspertsko znanje implementirano u modelu kao i dodatnih zahteva korisnika, aplikacija daje predlog u obliku izveštaja. Izveštaj sadrži predlog tipa konstrukcije i orijentacije objekta, tehnološkog sistema gajenja, tehničko-tehnološkog sistema ventilacije, grejanja i navodnjavanja kao i njihove kapacitete, površine neophodnih pratećih objekata i površine predviđene za buduće proširenje. Svaki generisani izveštaj korisnik može sačuvati za kasniju upotrebu. Na taj način korisnik može upoređivati dva ili više predloga aplikacije i doneti konačnu odluku o podizanju sistema biljne proizvodnje u kontrolisanim uslovima po predloženoj specifikaciji.

Published
2016

28. Projektovanje, razvoj i implementacija ekspertskog sistema za brzu detekciju i izolaciju neželjenih stanja dinamičkih sistema

Author

Jeličić, Zoran, Kovačević, Branko, Kulić, Filip, Bojanić, Dubravka, Rapaić, Milan, Petković, Milena, Jeličić, Zoran, Kovačević, Branko, Kulić, Filip, Bojanić, Dubravka, Rapaić, Milan, and Petković, Milena

Abstract

Rad je posvećen problemu rane i brze detekcije i izolacije neželjenih stanja dinamičkih sistema, sa posebnim naglaskom na rano otkrivanje različitih nepravilnosti u radu i kvarova industrijskih procesa., The thesys is dedicated to the problem of early and swift detection and isolation of unwanted working regimes of dynamical systems, with particular emphasis on the early detection of various irregularities and failures of industrial processes.

Published
2015

29. Optimalno i suboptimalno podešavanje parametara robusnih linearnih regulatora necelog reda

Author

Jeličić, Zoran, Kovačević, Branko, Petrovački, Dušan, Rapaić, Milan, Kulić, Filip, Šekara, Tomislav, Jakovljević, Boris, Jeličić, Zoran, Kovačević, Branko, Petrovački, Dušan, Rapaić, Milan, Kulić, Filip, Šekara, Tomislav, and Jakovljević, Boris

Abstract

Rad je posvećen robusnom upravljanju sistemima čiji je linearni regulator i/ili dinamika necelog reda, kao i upravljačkim problemima gde regulator necelog reda u sebi poseduje i linearnu i nelinearnu dinamiku, a koji upravlja procesima čija dinamika može i linearna i nelinearna., The thesys is dedicated to robust control systems problems with linear controllers and/or process dynamics of noninteger order, as well as control issues with combination of linear and nonlinear controllers of noninteger order that control either linear or nonlinear systems.

Published
2015

30. Ekspertski sistem za upravljanje brodskom prevodnicom zasnovan na računarskoj inteligenciji

Author

Kulić, Filip, Jeličić, Zoran, Šekara, Tomislav, Bačkalić, Todor, Čongradac, Velimir, Bugarski, Vladimir, Kulić, Filip, Jeličić, Zoran, Šekara, Tomislav, Bačkalić, Todor, Čongradac, Velimir, and Bugarski, Vladimir

Abstract

U disertaciji je dato jedno rešenje automatskog operativnog upravljanja dvosmernom brodskom prevodnicom sa jednom komorom. Kreiran je ekspertski sistem zasnovan na rasplinutoj (fuzzy) logici. Upravljački sistem je testiran na modelu brodske prevodnice koji je kreiran na osnovu statističkih podataka o gustini saobraćaja na hidrosistemu DTD (Dunav-Tisa-Dunav), na osnovu tehničke dokumentacije brodske prevodnice i na osnovu razgovora sa operaterima. Sistem je zatim optimizovan globalnim algoritmima optimizacije. Dobijeno rešenje se pokazalo značajno bolje u poređenju sa standardnim algoritmima odluke., This thesis presents a solution to automatic control of a two-way one-channel ship lock. Expert system based on fuzzy logic is designed. This control system is tested on model of ship lock created using statistical data of transportation density on DTD (Danube-Tisa-Danube) channel, using technical documentation of ship lock and interview with operators. The system is further optimized with global optimization techniques. Given solution proved to be significantly better than standard decision algorithms.

Published
2015

31. Модификација покрета робота при двоножном кретању или стајању у присуству ограничења или поремећаја

Author

Borovac, Branislav, Surla, Dušan, Konjović, Zora, Kulić, Filip, Šešlija, Dragan, Potkonjak, Veljko, Николић, Милутин, Borovac, Branislav, Surla, Dušan, Konjović, Zora, Kulić, Filip, Šešlija, Dragan, Potkonjak, Veljko, and Николић, Милутин

Abstract

У тези су анализиране карактеристичне компензационе стратегије, за које је уочено да их човек често примењује. На основу анализе су дефинисане предности и мане сваке од стратегија. Након тога је приказан систем за приоритетизацију задатака, ради истраживања могућности симултане реализације више задатака. Да би се омогућило укључивање различитих задатака и ограничења развијен је формални начин њиховог записивања. Посебна пажња је дата ограничењима која настају као последица контакта са околином. Развијена је методологија којом се утврђује да ли неки од постојећих контаката може бити раскинут а да жељени покрет буде изводив, као и да ли је ради реализације намераваног покрета потребно успоставити нови контакт. Укључивањем ограничења у систем за приоритетизацију је добијена методологија за модификацију покрета у присуству ограничења., U tezi su analizirane karakteristične kompenzacione strategije, za koje je uočeno da ih čovek često primenjuje. Na osnovu analize su definisane prednosti i mane svake od strategija. Nakon toga je prikazan sistem za prioritetizaciju zadataka, radi istraživanja mogućnosti simultane realizacije više zadataka. Da bi se omogućilo uključivanje različitih zadataka i ograničenja razvijen je formalni način njihovog zapisivanja. Posebna pažnja je data ograničenjima koja nastaju kao posledica kontakta sa okolinom. Razvijena je metodologija kojom se utvrđuje da li neki od postojećih kontakata može biti raskinut a da željeni pokret bude izvodiv, kao i da li je radi realizacije nameravanog pokreta potrebno uspostaviti novi kontakt. Uključivanjem ograničenja u sistem za prioritetizaciju je dobijena metodologija za modifikaciju pokreta u prisustvu ograničenja., The thesis analyzes the characteristic compensation strategies, which are observed to be often applied by men. Based on the analysis benefits and disadvantages each of the strategies are defined. After that, the task prioritization framework is shown, which enables simultaneous realiztation of multiple tasks. In order to include different tasks and constraints in the framework, the formal way of their notation is developed. Special attention is given to the constraints that arise as a consequence of contacts with the environment. Methodology for determining whether some of the existing contacts can be broken, but that the desired movement is feasible, and whether is it necessary to establish a new contact for the realization of the intended movement. By including the constraints in the task prioritization framework, methodology for modification of the movement in the presence of constraints is obtained.

Published
2015

32. Tranzicije regionalnih energetskih sistema

Author

Petrović, Jovan, Grković, Vojin, Gvozdenac, Dušan, Kulić, Filip, Stojiljković, Mladen, Kljajić, Miroslav, Petrović, Jovan, Grković, Vojin, Gvozdenac, Dušan, Kulić, Filip, Stojiljković, Mladen, and Kljajić, Miroslav

Abstract

Na regionalnom planu evidentne su potrebe za visokim energetskim performansama, promenom strukture izvora energije i modernizacijom energetske infrastrukture, što zahteva novi i inoviran razvojni put praćen korenitim promenama i sistemskim pristupom a u skladu sa novim društvenim, ekonomskim i tehnološkim prilikama. Takav razvojni put bi učinio regionalne energetske sisteme efikasnim i održivim i predstavlja energetsku tranziciju. Disertacija kombinuje različite tehnike i pristupe za analizu mnogih aspekata razvoja regionalnih energetskih sistema od kojih su najvažniji povećanje energetske efikasnosti u sistemima proizvodnje energije, diversifikaciju izvora energije (kombinovanje obnovljivih i neobnovljivih izvora energije) i poboljšanja u energetskoj infrastrukturi (nova i savremena tehnološka rešenja)., At the regional level, there are evident needs for a high energy performance, change the structure of energy sources and modernization of the energy infrastructure, which requires a new and innovative development path, followed by fundamental changes and systemic approach in accordance with the new social, economic and technological conditions. Such a development path would make regional energy systems efficient and sustainable and represents the energy transition. The thesis combines a variety of techniques and approaches for the analysis of many aspects of the development of regional energy systems, but especially increasing of energy efficiency in energy production systems, diversification of energy sources (a combination of renewable and non-renewable energy sources) and improvements in energy infrastructure (new and modern technological solutions).

Published
2014

33. Sinteza i realizacija dvonožnog hoda putem primitiva

Author

Borovac, Branislav, Surla, Dušan, Konjović, Zora, Kulić, Filip, Šešlija, Dragan, Raković, Mirko, Borovac, Branislav, Surla, Dušan, Konjović, Zora, Kulić, Filip, Šešlija, Dragan, and Raković, Mirko

Abstract

U tezi je prikazan novi metod za sintezu i realizaciju dvonožnog veštačkog hoda koji se zasniva na upotrebi jednostavnih pokreta čijim je kombinovanjem moguće realizovati kompleksne pokrete kao što je hod, a čiji se parametri mogu menjati tokom kretanja. Time je omogućeno da se na osnovu informacija o nameravanom kretanju i stanja okoline izvrši sinteza kretanja izborom i kombinacijom jednostavnih bazičnih pokreta koje se nazivaju primitivi. Takođe je omogućeno da se, tokom izvršavanja hoda bez njegovog prekida, menjaju parametri kretanja kao što su brzina hoda, dužina koraka, pravac kretanja i visina podizanja noge tokom prenosne faze. Potvrda je data kroz eksperimentalne rezultate koji su sprovedeni simulacijom na dinamičkom modelu humanoidnog robota., This dissertation presents new method for the synthesis and realization of biped artificial walk based on the use of simple movements that can be combined in order to achieve complex movements such as walk, whereas it is possible to change the motion parameters at any time. It means that, based on the information about intended movement and current state of the environment, it is possible to synthesize motion by selecting and tying simple movements, i.e. motion primitives. It also enables the robot to change walking parameters online such as walking speed, direction of walk, foot length during swing phase and step length. Proof of this method is given by experimental results obtained during the simulation on a dynamic model of humanoid robot.

Published
2013

36. HYBRID ARTIFICIAL NEURAL NETWORK SYSTEM FOR SHORT-TERM LOAD FORECASTING.

Author

Ilić, Slobodan A., Vukmirović, Srdjan M., Erdeljan, Aleksandar M., and Kulić, Filip J.

Subjects
ARTIFICIAL neural networks, ELECTRIC utilities, ENERGY consumption, ENERGY management
Abstract

This paper presents a novel hybrid method for short-term load forecasting. The system comprises of two artificial neural networks (ANN), assembled in a hierarchical order. The first ANN is a multilayer perceptron (MLP) which functions as integrated load predictor (ILP) for the forecasting day. The output of the ILP is then fed to another, more complex MLP, which acts as an hourly load predictor (HLP) for a forecasting day. By using a separate ANN that predicts the integral of the load (ILP), additional information is presented to the actual forecasting ANN (HLP), while keeping its input space relatively small. This property enables online training and adaptation, as new data become available, because of the short training time. Different sizes of training sets have been tested, and the optimum of 30 day sliding time-window has been determined. The system has been verified on recorded data from Serbian electrical utility company. The results demonstrate better efficiency of the proposed method in comparison to non-hybrid methods because it produces better forecasts and yields smaller mean average percentage error. [ABSTRACT FROM AUTHOR]

Published
2012
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37. Automatsko podešavanje parametara PID regulatora zasnovano na rasplinutoj logici sa primenom u automatizaciji stambeno-poslovnih objekata

Author

Kamenko, Ilija, Čongradac, Velimir, Jeličić, Zoran, Kulić, Filip, Šekara, Tomislav, Bugarski, Vladimir, and Vukmirović, Srđan

Subjects
PID, rasplinuta (fazi) logika, ekspertsko znanje, automatsko podešavanje parametara, stambeno-poslovni objekti, model u realnom vremenu, PID, fuzzy logic, expert knowledge, auto-tuning, building automation, real-time model, Hardware-in-loop, ПИД, расплинута (фази) логика, експертско знање, аутоматско подешавање параметара, стамбено-пословни објекти, модел у реалном времену
Abstract

У дисертацији је представљено једно решење аутоматског подешавања ПИД (пропорционално-интегрално-диференцијалног) регулатора засно-вано на експертском знању имплементираном у расплинутом (фази) систему закључивања. Предложена метода је верификована рачунар-ским симулацијама коришћењем широког спектра различитих модела процеса. Након успешне верификације предложена метода је имплемен-тирана на реалном контролеру који се обично користи у аутоматизацији стамбено-пословних објеката. Тестирање је извршено на експериментал-ној поставци у лабораторији., U disertaciji je predstavljeno jedno rešenje automatskog podešavanja PID (proporcionalno-integralno-diferencijalnog) regulatora zasno-vano na ekspertskom znanju implementiranom u rasplinutom (fazi) sistemu zaključivanja. Predložena metoda je verifikovana računar-skim simulacijama korišćenjem širokog spektra različitih modela procesa. Nakon uspešne verifikacije predložena metoda je implemen-tirana na realnom kontroleru koji se obično koristi u automatizaciji stambeno-poslovnih objekata. Testiranje je izvršeno na eksperimental-noj postavci u laboratoriji., The dissertation presents a solution for automatic tuning of the PID (proportional-integral-differential) controller based on expert knowledge imple-mented in a fuzzy inference system. The proposed method was verified by computer simulations using a wide range of different process models. After successful verification, the proposed method was implemented on a real con-troller commonly used in the automation of residential and commercial build-ings. The testing was done on an experimental setup in the laboratory.

Published
2023

38. Savremene metode projektovanja konvencionalnih industrijskih regulatora pod ograničenjima na robusnost

Author

Bošković, Marko, Rapaić, Milan, Šekara, Tomislav, Jeličić, Zoran, Kulić, Filip, Kapetina, Mirna, and Mikulović, Jovan

Subjects
Projektovanje konvencionalnih regulatora, numeričke metodeprojektovanja, analitičke metode projektovanja, performansa,robusnost, potiskivanje poremećaja, sekundarna regulacijafrekvencije, Design of conventional controllers, optimization-based design methods,analytical design methods, performance, robustness, load disturbancesuppression, load frequency control, Пројектовање конвенционалних регулатора, нумеричке методепројектовања, аналитичке методе пројектовања, перформанса,робусност, потискивање поремећаја, секундарна регулацијафреквенције
Abstract

Предмет истраживања је развој нових метода пројектовањаконвенционалних управљачких структура пропорционално-интегрално-диференцијалног типа, са и без редно везаног стабилишућегкомпензатора. Предложене методе пројектовања су примјенљиве наширокoj класи индустријских процеса: стабилних, интегралних,нестабилних, процеса са временским кашњењем, затим процеса санеминималном фазом, процеса са дистрибуираним параметрима.Посебно су развијене аналитичке формуле подешавања параметараPID/PIDC регулатора за секундарну регулацију фреквенције и снагеразмјене у оквиру конвенционалних електроенергетских система., Predmet istraživanja je razvoj novih metoda projektovanjakonvencionalnih upravljačkih struktura proporcionalno-integralno-diferencijalnog tipa, sa i bez redno vezanog stabilišućegkompenzatora. Predložene metode projektovanja su primjenljive naširokoj klasi industrijskih procesa: stabilnih, integralnih,nestabilnih, procesa sa vremenskim kašnjenjem, zatim procesa saneminimalnom fazom, procesa sa distribuiranim parametrima.Posebno su razvijene analitičke formule podešavanja parametaraPID/PIDC regulatora za sekundarnu regulaciju frekvencije i snagerazmjene u okviru konvencionalnih elektroenergetskih sistema., The subject of the research is the development of new methods for designingconventional control structures of the proportional-integral-differential type,with and without a series-connected stabilizing compensator. The proposeddesign methods are applicable to a wide class of industrial processes: stable,integral, unstable, time-delayed processes, processes with non-minimumphase, processes with distributed parameters. Analytical formulas foradjusting the parameters of PID / PIDC controllers for secondary regulationof frequency and power interchange within conventional power systems havebeen specially developed.

Published
2021

39. Adaptive Parameter Estimation in Systems described by Irrational TransferFunctions

Author

Kapetina, Mirna, Rapaić, Milan, Kovačević, Branko, Jeličić, Zoran, Kulić, Filip, and Šekara, Tomislav

Subjects
Parameter Estimation, Model Identification, Linear System, Least SquareMethod, Gradient Algorithm, Irrational Transfer Functions, Fractional OrderSystems, Delayed Systems, Distributed Parameter, Systems CNG system, Estimacija parametara, identifikacija modela, linearni sistemi,metod najmanjih kvadrata, gradijentni algoritam, iracionalnefunkcije prenosa, frakcioni sistemi, sistemi sa kašnjenjem, sistemisa distribuiranim parametrima, CNG sistem
Abstract

Predmet istraživanja je identifikaciji i adaptivna estimacijaparametara široke klase linearnih sistema. Predloženi algoritmiza adaptivnu estimaciju parametara su primenjivi na sisteme koji seopisuju funkcijama prenosa proizvoljnog oblika, što uključuje sistemesa kašnjenjem, distribuiranim parametrima, frakcione sisteme idruge sisteme opisane iracionalnim funkcijama prenosa. Naposletku, dat je algoritam za identifikaciju CNG sistema koji se neizvršava u realnom vremenu i pretpostavlja da struktura modela nijepoznata unapred., The subject of this research is the system identification and adaptiveparameter estimation in wide class of linear processes. Proposedapproaches for adaptive parameter estimation can be applied to systemsdescribed by transfer functions of arbitrary form, including systems withdelay, distributed-paratemeter systems, fractional order systems, and othersystem described by irrational transfer functions. In the final part, an offlinealgorithm for identification of CNG system which does not assume any apriori known model structure is proposed.

Published
2017

40. Projektovanje, razvoj i implementacija ekspertskog sistema za brzu detekciju i izolaciju neželjenih stanja dinamičkih sistema

Author

Petković, Milena, Jeličić, Zoran, Kovačević, Branko, Kulić, Filip, Bojanić, Dubravka, and Rapaić, Milan

Subjects
ekspertski sistemi, Fault detection and isalation, fault diagnosis, adaptive clustering algorithms, expert systems, dijagnostika kvarova, Fault detection and isalation, adaptive clustering algorithms, expert systems, prilagodljivo grupisanje i razvrstavanje podataka, fault diagnosis, Detekcija i izolacija neželjenih stanja, dijagnostika kvarova, prilagodljivo grupisanje i razvrstavanje podataka, ekspertski sistemi, Detekcija i izolacija neželjenih stanja
Abstract

Rad je posvećen problemu rane i brze detekcije i izolacije neželjenih stanja dinamičkih sistema, sa posebnim naglaskom na rano otkrivanje različitih nepravilnosti u radu i kvarova industrijskih procesa., The thesys is dedicated to the problem of early and swift detection and isolation of unwanted working regimes of dynamical systems, with particular emphasis on the early detection of various irregularities and failures of industrial processes.

Published
2015

41. Ekspertski sistem za upravljanje brodskom prevodnicom zasnovan na računarskoj inteligenciji

Author

Bugarski, Vladimir, Kulić, Filip, Jeličić, Zoran, Šekara, Tomislav, Bačkalić, Todor, and Čongradac, Velimir

Subjects
Fazi ekspertski sistem, podrška u odlučivanju, SCADA, genetski algoritam, PSO, veštačka kolonija pčela, brodska prevodnica, Artificial bee colony, Ship lock, Fuzzy expert system, Decision support, Genetic algorithm
Abstract

U disertaciji je dato jedno rešenje automatskog operativnogupravljanja dvosmernom brodskom prevodnicom sa jednom komorom.Kreiran je ekspertski sistem zasnovan na rasplinutoj (fuzzy) logici.Upravljački sistem je testiran na modelu brodske prevodnice koji jekreiran na osnovu statističkih podataka o gustini saobraćaja nahidrosistemu DTD (Dunav-Tisa-Dunav), na osnovu tehničkedokumentacije brodske prevodnice i na osnovu razgovora saoperaterima. Sistem je zatim optimizovan globalnim algoritmimaoptimizacije. Dobijeno rešenje se pokazalo značajno bolje u poređenjusa standardnim algoritmima odluke., This thesis presents a solution to automatic control of a two-way one-channelship lock. Expert system based on fuzzy logic is designed. This controlsystem is tested on model of ship lock created using statistical data oftransportation density on DTD (Danube-Tisa-Danube) channel, usingtechnical documentation of ship lock and interview with operators. Thesystem is further optimized with global optimization techniques. Givensolution proved to be significantly better than standard decision algorithms.&nbsp

Published
2015

42. Optimal and suboptimal parameter tuning of robust, linear controllers of noninteger order

Author

Jakovljević, Boris, Jeličić, Zoran, Kovačević, Branko, Petrovački, Dušan, Rapaić, Milan, Kulić, Filip, and Šekara, Tomislav

Subjects
Linear controllers, PID controllers, FPID controllers, DOPID controllers, robustness, optimization, sliding mode control, linearni regulatori, PID regulatori, FPID regulatori, DOPID regulatori, robustnost, optimizacija, klizni režim
Abstract

Rad je posvećen robusnom upravljanju sistemima čiji je linearni regulator i/ili dinamika necelog reda, kao i upravljačkim problemima gde regulator necelog reda u sebi poseduje i linearnu i nelinearnu dinamiku, a koji upravlja procesima čija dinamika može i linearna i nelinearna., The thesys is dedicated to robust control systems problems with linearcontrollers and/or process dynamics of noninteger order, as well as controlissues with combination of linear and nonlinear controllers of nonintegerorder that control either linear or nonlinear systems.

Published
2015

43. Transitions of Regional Energy Systems

Author

Kljajić, Miroslav, Petrović, Jovan, Grković, Vojin, Gvozdenac, Dušan, Kulić, Filip, and Stojiljković, Mladen

Subjects
Energy Efficiency, Energetski sistemi, Energy Transition, Energy Systems, Energetska efikasnost, Energetska tranzicija
Abstract

Na regionalnom planu evidentne su potrebe za visokim energetskim performansama, promenom strukture izvora energije i modernizacijom energetske infrastrukture, što zahteva novi i inoviran razvojni put praćen korenitim promenama i sistemskim pristupom a u skladu sa novim društvenim, ekonomskim i tehnološkim prilikama. Takav razvojni put bi učinio regionalne energetske sisteme efikasnim i održivim i predstavlja energetsku tranziciju. Disertacija kombinuje različite tehnike i pristupe za analizu mnogih aspekata razvoja regionalnih energetskih sistema od kojih su najvažniji povećanje energetske efikasnosti u sistemima proizvodnje energije, diversifikaciju izvora energije (kombinovanje obnovljivih i neobnovljivih izvora energije) i poboljšanja u energetskoj infrastrukturi (nova i savremena tehnološka rešenja). At the regional level, there are evident needs for a high energy performance, change the structure of energy sources and modernization of the energy infrastructure, which requires a new and innovative development path, followed by fundamental changes and systemic approach in accordance with the new social, economic and technological conditions. Such a development path would make regional energy systems efficient and sustainable and represents the energy transition. The thesis combines a variety of techniques and approaches for the analysis of many aspects of the development of regional energy systems, but especially increasing of energy efficiency in energy production systems, diversification of energy sources (a combination of renewable and non-renewable energy sources) and improvements in energy infrastructure (new and modern technological solutions).

Published
2014

44. Synthesis and realization of biped walk using primitives

Author

Raković, Mirko, Borovac, Branislav, Surla, Dušan, Konjović, Zora, Kulić, Filip, and Šešlija, Dragan

Subjects
Humanoid robots, Humanoid and bipedal locomotion, Motion primitives, Humanoidni roboti, dvonožna lokomocija, primitivi
Abstract

U tezi je prikazan novi metod za sintezu i realizaciju dvonožnogveštačkog hoda koji se zasniva na upotrebi jednostavnih pokreta čijimje kombinovanjem moguće realizovati kompleksne pokrete kao što jehod, a čiji se parametri mogu menjati tokom kretanja. Time je omogućenoda se na osnovu informacija o nameravanom kretanju i stanja okolineizvrši sinteza kretanja izborom i kombinacijom jednostavnihbazičnih pokreta koje se nazivaju primitivi. Takođe je omogućeno da se,tokom izvršavanja hoda bez njegovog prekida, menjaju parametrikretanja kao što su brzina hoda, dužina koraka, pravac kretanja ivisina podizanja noge tokom prenosne faze. Potvrda je data krozeksperimentalne rezultate koji su sprovedeni simulacijom nadinamičkom modelu humanoidnog robota., This dissertation presents new method for the synthesis and realization ofbiped artificial walk based on the use of simple movements that can becombined in order to achieve complex movements such as walk, whereas itis possible to change the motion parameters at any time. It means that,based on the information about intended movement and current state of theenvironment, it is possible to synthesize motion by selecting and tying simplemovements, i.e. motion primitives. It also enables the robot to changewalking parameters online such as walking speed, direction of walk, footlength during swing phase and step length. Proof of this method is given byexperimental results obtained during the simulation on a dynamic model ofhumanoid robot.

Published
2013

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